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(No Model.) 3 sheets-sheet 1.

o. M. MORSE.

MIDDLINGS PURIFIER. No. 304,225. Patent-ed Aug. 26, 1884.

`(N0 MOdel.) 3 Sheets-Sheet 2.

O. M. MORSE.

MIDDLINGS PURIFIBR.

l No. 304,225, l Patented'Aug. 26, 1884.

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N. Pneus. Pnmmnwmpsmr. wmmgwn. D. c.

(No Model.) 3 Sheets-Sheet 3.

0. M. MORSE.

MIDDLINGS PURIPIBR.

No.v 304,225. Patented Aug. 26, 1884.

Pay

UNITED STATES ORVILLE M.

PATENT EEicE.

IVIIDDLINGS-PURIFIER.

SPECIFICATION formingpart of Letters Patent No. 304,225, dated Augustze, 1884.

Application filed December 12, 1883.

To all whom it may concern:

Beit known that I, ORVILLE M. MoEsE, of Jackson, in the county ofJackson and State of Michigan, have invented new and useful Improvementsin Middlin gs-Puriiiers, of which the following is a specification.

This invention relates to an improvement in that class of bolting orseparating machines which are composed of an inclined sieve and anelevating mechanism, whereby the material which has passed over thesieve and escapes from the lower end thereof is elevated and deliveredupon the upper end of the sieve, and in which the material is at thesame time caused to movegradually across the sieve, so that the materialis repeatedly elevated and caused to flow over the inclined sieve inpassing through the machine. Apparatus of this character is describedand shown in Letters Patent of the United States No. 225,536, datedMarch 16, 1880, and No. 255,002, dated March 14, 1882, to whichreference is here made for a more complete description of the saine.

The object of the present invention is -to adapt the machine to thepurification of middlings by organizing the machine in such manner thatcurrents of varying strength can be directed upwardly through thediiferent sections of the screen, in order to adapt the force and volumeof the air-currents tol the character of the material passing over thedifferent screen-sections.

My invention consists, to this end, of the improvements in theconstruction of the machine which will be hereinafter fully set forth,and pointed out in the claims.

In the accompanying drawings, consisting of three sheets, Figure 1 is avertical cross-section of a machine provided with my improvements. Fig.2 is an elevation of the tail end of the machine. Fig. 3 is alongitudinal section on line x x, Fig. 1. Fig. 4 is a longitudinalsectional elevation of the machine. Fig. 5 is a cross-section on anenlarged scale of the screen and wipers. Fig. 6 is a front elevation ofthe upper part of the machine. Fig. 7 is a topplan view of the same.

Like letters of reference denote like parts in the several gures.

A is the inclosing-case of the machine, se-

(No model.)

cured to a frame, A', and constructed in any suitable or wellknownmanner.

B represents the separating orboltin g screen, arranged in an inclinedposition Within the case A, and composed of a suitablenumber ofsections, b b b2, arranged side by side. The several sections areclothed with bolting-cloth of the proper mesh, in accordance With theparticular kind of work for which the machine is designed. Ordinarilythe sections are clothed 6o with cloth of increasing coarseness from thehead toward the tail ofthe machine, the section I) being covered withthe lfinest and the section b2 with the coarsest cloth. The screen ispreferably so inclined that the material will flow over the same bygravity.

C represents the meal-chamber above the screen B, in which the elevatingmechanism D is arranged, and which receives the material to be separatedor bolted. i 7o E represents the flour-chamber underneath the screen,which receives the fine material which has been bolted through theinclined screen, and which is provided with suitable conveyers, e e',and slides e2, for drawing off 75 the various grades of the boltedmaterial, as may be desired. The elevating mechanism consists,preferably, of pulleys or drums d d and buckets f f, secured to one ormore endless belts or chains, f', running around the 8o pulleys d d; butany other suitable elevatorfor instance, a bucket-reel-may be employed,

if preferred.

g represents the feed-openin g through which the material to beseparated or bolted is delivered into the meal-chamber O.

H H IFI2 represent air-chambers arranged above the several sections ofthe screen, separated by partitions h 1L', which extend to or nearly tothe surface of the screen. 93

e3 e4 arc partitions formed in the flour-chamber E underneath thescreen, and located underneath the partitions h It of the air-chamber,and dividing the flour-chamber into compartments corresponding with theair-cham- 95 bers H H H2.

e5 e5 e5 are air-openings, through which air is admitted to thecompartments of the flourchamber E.

I represents a suction-fan, the eye of which 10o is connected with theair-chambers H H H2 by spouts fi t" 2, each opening into one of theair-chambers, and provided with a slide or damper, il, by which theforce and volume of the air-currents drawn through the severalair-chambers can be regulated. The increasing coarseness of the textureof the boltingcloth with which the different sections of the screen arecovered, in connection with the increasing eoarseness and decreasingbulk of the material ilowing over successive sections, tends to gradethe strength of the air-currents which are drawn through successivescreensections, so that light air-currents are drawn through the linesections,and stronger or heavier currents through the coarser sections,in the absence of any other means for regulating the air-currents. g Thechambers H H H2 are arranged side by side between'the lower side of theelevating mechanism and the upper side of the screen.

la 7c are flexible strips or curtains secured,

respectively, to the upper and lower edges of the air-chambers, andresting on the screen or casing, to prevent, as far as possible, ytheadmission of air to the air-chambers, except through the meshes of thescreen. The ends of the screen-frame project through openin gs m m',formed in the end walls of the case A. One end of the screen-frame restsagainst. a spring, n, and the other end of the screenframe is struck bya knocker, whereby the screen is jarred and the meshes are kept open.

o represents adjustable deflecting boards pivoted to the upper side ofthe top plate, j', of the airchamber, and connected by a shifting-(bar,o', whereby the position of the deilecting-boards o can be regulated.These deilecting-boards can be adjusted so as to turn or deflect thematerial as it is discharged from the elevator toward or from the headof the machine, thereby accelerating or retarding the tendency of thematerial to work toward the tail end of the machine, whichI tendency isgiven to the material by a slight inclination or pitch of the machinefrom its head toward its tail end. By inclining the deecting-boards moreor less toward the head of the machine the progress of the materialtoward the tail end is more or less retarded. The deilectingl boards arepreferably arranged more closely together as they approach the tail endof the machine, as represented in Fig. 4, thereby retarding the materialmore and more in the same measure as its quantity grows less by theremoval of the fine material which is bolted out. lf preferred, themachine may be arranged horizontally, and the movement of the materialfrom the head to the tail of the ma chine may be effected solely by thedeflectingboards o.

P P P2 represent wipers or cleaners arranged in the several ainehambersH H H2, so as t0 bear upon the upper sides of the severalscreensections. The wipers P P P2 are attached to a frame, Q, whichtravels back and forth above the upper surface of the screen. The wipersP P P2 are arranged in vertical planes, and eX- tend from the upper tothe lower edges of the screen-sections, their reciprocating movementtaking place in planes at right angles to the inclination of the screen.The wiper-frame Q consists of horizontal bars q, which are guided inopenings formed in the partitions h h', and inclined connecting-bars q,which are rigidly secured to the bars q. The WipersPPP2 consist each ofa series of bars or stocks, p,which are connected at their ends by linksp', and

provided on their under sides with wires p,or

strips of rubber, felt, or other flexible material, or brushes whichbear upon the upper side of thescreen. As each wiper consists of aseriesof members flexibly connected together, it is free to adapt itself tothe surface of the cloth, if the latter should bag or sag between theframe or ribs of the screen. The frame Q is actuated by a bar, o", whichis secured with its lower end to the frame Q, and projects through anelongated opening or slot, r', formed in the top plate of the centralair-chamber, H. This slot is protected by strips of rubber or otherelastic material, which substantially prevent the air from passingthrough said slot. The

upper end of the bar r projects through a horizontal slot, r2, formed inthe front wall of the casing A. The bar fr is actuated by ahorizontalendless belt, R, arranged at the front side of the machine, near theslot r2. The belt R runs over two pulleys, s s, and is connected withthe bar o" by a cord or chain, s2, whereby the arm r and the frame Q,attached thereto, are drawn back and forth. The pulley s is secured to ashort shaft which turns in a bracket, s, and which carries at its outerenda bevel-wheel, 8*. The latteris driven by a bevel-pinion, S5, whichis secured to the in ner end of a horizontal shaft, s, its outer endbeing provided with a pulley, T, to which motion is communicated by anendless belt, t, from. a pulley, t, mounted on the upper shaft of theelevating mechanism. The pulley s turns loosely on an arbor or studwhich is secured to abracket, t2. Both pulleys are unobstructed at theirinner sides, so that the chain or cord s2 can pass freely around thepulley with the belt. The lateral movement IIO of the frame Q and ofeach wiper is limited to tail of the machine.

The middlings to be purified are fed into the meal-chamber C through thespout g, or in any other suitable manner. The middlings are elevatedfrom the bottom of the casing and causedvto flow repeatedly over theinclined screen. In passing over the fine screen-section b at the headof the machine the material is subjected to a light air-current, adaptedto the separation and removal of the light irnpuri ties. This lightair-current is caused partly by the close texture of the bolting-cloth,the density of the mass of material flowing over the screen, and theadjustment of the air-current-by the slide in the spout e'. In flowingover the next coarser section, b', the material encounters a heavierair-current, by reason of the coarser texture of the cloth, thedecreased bulk of the material, and the adjustment of the slide in thetrunk 'i'. A still stronger aircurrent operates upon the materialpassing over the next coarser section, b2, and for the same reasons. Thepurified middlings which pass through the screen are collected in themeal-chamber and discharged separated into different grades, ortogether,as may be desired. The light impurities are removed by the aircurrents,and the bran and heavy residuary material are tailedoff through anopening formed near the bottom of the casing at the tail end of the1naehine.`

It is obvious that the air-currents may be directed through the screenby a blast fan or fans, instead of a suction-fan, if preferred.

I do not claim in this application anything claimed in my applicationNo. 114,262, filed December 12, 1883.

I claim as my invention- 1. In amiddlingspuriier, the combination, withan inclined screen composed of sections having different degrees ofneness arranged side by side, of an elevator,whereby the mate' rialescaping from the lower end of the screen is returned to its upper end,means whereby the material is caused to move laterally across the screenfrom the ne to the coarse sections, and an air-trunk and fan,whereby anair-current is directed upwardly through the screen, substantially asset forth. l

2. In a middlings-purifier, the combination, with an inclined screen, ofan air-trunk and fan, whereby an air-current is directed upwardlythrough the screen, an elevator, whereby the material escaping from thelower end of the screen is returned to its upper end, means whereby alateral motion across the screen is imparted to the material, and acleaner operating to keep the screen open, substantially as set forth. f

3. In a middlings-purer, the combination, with an inclined screencomposed of sections of different degrees of iineness, arranged side byside, of an elevator, whereby the material esi caping from the lower endof the screen is returned to its upper end, an air-trunk and fan,whereby air-currents are directed upwardly through the screen, and meanswhereby the force of the air-currents which pass through the differentsections of the screen can be regulated, substantially as set forth.

4. In a midd1ingspuriter, the combination, with an inclined screencomposed of sections of different degrees of iineness, arranged side byside, of an elevator, whereby the materialescaping from the lower end ofthe screen is re# turned to its upper end, afan, whereby aircurrents arecaused to pass upwardly through the screen, and a divided air-trunkhaving adjusting devices for regulating the force of the air-currentsthrough the different sections of the screen, substantially as setforth.

Vitness my hand this 19th day of November, 1883.

oRvILLE M'. Mensa.

Vitnesses: i

JNO. G. MUNDY,

CHAs. F. GEYER.

